Topic: electrical help please

[Ceej]

I'm ready to pull my hair out over this one.

Had my bike (74 cb750) die on me last week, all electronics dead.  Got it home, and i jiggled the wires under the ignition switch around and it ran for about 10 seconds and died again, did the same thign again with the same results.  So, i figured, bad ignition switch.  I got my new ignition switch in today, wire it up, and click in on.  Lights come on, headlight neutral light, workin fine.  Then i fire the bike up, and it runs for about 10 seconds and dies.  Wont come back, so i go inside for a little while to relax, come back out, and turn the key on and it works, so i fire the bike up, and it runs for a couple seconds and cuts off.  When the ignition switch is in the second position, just the brake light comes on, but in the first position, where it us suposed to run, nothing happens.  This is a brand new ignition switch.  Anyone have any ideas?

Thanks,
CJ

[Bob Wessner]

Wont come back, so i go inside for a little while to relax, come back out, and turn the key on and it works, so i fire the bike up, and it runs for a couple seconds and cuts off.

I may be the last person here to even comment on electrical issues, but I did note this statement and given the intermittent nature of it, maybe you have a high resistance connection somewhere that is generating some heat, opening some circuit?? Just a SWAG.

[mb3000gt]

did you check the wires and pins on the switch connector?

[Ceej]

yes ive checked the wires and pins on the switch connector

how would one get a high resistance connection? and how would one get rid of it?

thanks for the help, keep em comin

[bowhunter]

Any connection that is not shiny clean and tight can cause a high resistance connection.Once the joint heats up, the connection is broken, and the motor stops. Start by pulling apart all the connections to the ignition circuits and the grounds involved.  The ground points are a more likely problem, since it dies instead of running bad. Clean them with a bit of fine sandpaper or steel wool, add some dielectric grease to help keep them from oxidizing further, then re-connect and tighten any screws or bolts.

Bowhunter